CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings	$ 25,836	$ 22,553
Foreign currency translation adjustments:
Foreign currency translation adjustments	(5,383)	(14,254)
Reclassification adjustment for gains included in net earnings		0
Net investment hedge and long-term intercompany loan translation adjustments	(1,172)	3,184
Cash flow hedges:
Net (loss) gain recognized in other comprehensive loss	(234)	298
Reclassification adjustment for losses included in net earnings	24	405
Total cash flow hedges	(210)	703
Pension and other post-retirement benefits:
Pension and other post-retirement benefits actuarial gain amortization	(130)	(136)
Other comprehensive income (loss), before tax	(6,895)	(10,503)
Income tax benefit (expense) related to items of other comprehensive loss	(485)	(1,666)
Other comprehensive loss, net of tax	(7,380)	(12,169)
Comprehensive income	$ 18,456	$ 10,384